Wrench



July 30, 1929. M1 ARCH'ER 1,722,652

WRENCH Filed Oct. 15. 1928 Patented July 30, 1929.

U ITED STATES PATENT. o1=1= 1=;.:

-MEBTON T. ARCHER, F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO THE- NATIONAL SUPPLY COMPANY, OF TOLEDO, OHIOQA CORPORATION OF OHIO. 7

WRENCH.

' Application filed October 13, 1928 Serial No. 312,243.

My invention relates to wrenches'designed for setting up and breaking, or disconnecting, threaded sucker rod joints, but capable of use for other purposes. i

It is the practice when using a sucker rod wrench to snap. up and break the sucker rod joints by a rapid movement of the wrench.

Sometimes theouter end of the wrench handle is struck a blow to ensure a tight joint. It

is the object of this invention to provide an improved wrench wherein the handle has a lost-motion connection with the wrench head so that the handle mayv acquire considerable energy intaking up the lost motion before it makes operative contact with one or more stops on the head. By this inventionthe handle imparts operative blows to the head either for tightening or loosening a threaded oint I t Referring to the accompanying drawings,

' 1 is a perspective view' of my invention; Fig. 2, an end elevation of Fig. 1 looking toward the left, the handle being'omitted;

and Fig. 3, a section of the wrench head-with '25 Fig. 2.

Referring first to Figs. 1, 2 and 3, 1 desigacross the opening nates the wrench head having the open-end P rigid- U-shaped jaw 2 7 opening for the reception of articles to be turned. The head has in'one edge of one leg of the jaw a rectangular opening 3 whose side walls 4 whose opposing edge walls 5 and .(icdiverge from the middle thereof to the ends 7 and 8 of the head. Between the opposing'points 9 and 10 where the converging walls 5 and 6 meet within the head a pivot pin 11 is passed transversely across the opening 3and through thewrench handle 12 near one end thereof, the width of the handle transversely across the same at the center of-the pivot and elsewhere in the head being preferably the same the pin;

the handle in side elevation and broken off, the section being taken on the line 3-3 on.

with a non-circular.

are parallel with each other and as the distance between the points and 10.

The lever within the head preferably engages simultaneously upper and lower portions of walls 5 and 6 at opposite sides of the pivot, as shown in Figs. 1 and3 and will. simultaneously engage the remaining upper and loWefpor-tions of the walls 5 and 6' on opposite sides of the pivot when the lever is swung downwardly to its limit, as shown in dotted lines in Fig, 3. The -edges of the handle in the head should preferably engage simultaneously an upper and lower wall of the-opening 3 ateach limit of its'stroketo relieve the pivot of shearing strains and to distribute the shocks on the handle through the longest distance possible in the, head. Strains on the pin willbe lessened if the, hole in the'handle for the pivotis slighty larger than the pivot as shown. 1 A close fit of. the I handle against the points 9 and 10 will protect It is thus seen that the handle can deliver a heavy torque blow to-the head tending to i turn it oneway or the other, according to the direction of motion of the handle;

I I claim- In a wrench, a head having a jaw andan opening therethrough, a handle having one end in the opening, and apivot transversely and between the. ends thereof and connecting the head and the handle, the handle having within-the head two striking surfaces on each side thereof and on opposite sides of the pivot, two of said sur faces on opposite sides of the handle and on oppositesides of the pivot adapted to deliver strokes to portions of the walls of the opening on opposite sides oft-he pivot when the handle is swung in one direction and the remaining 4 two of said surfaces adapted to deliver strokes to other portions of the said walls when the .85 v

MEBTON T. ARCHER. 

